Got any valuable ones? I grew up in the 60s and 70s and I have two full paper grocery bags full that I paid anywhere from .05 to .25. Some of them first run, first in the series. I guess some could be valuable.
What do you have? Superhero, horror, Western, cartoon stuff?
The lowest cover price on a comic book was 10¢ and those were from the late 30's - 40's. If you have any of those, then yes, you could be sitting on a small fortune depending on what you have and the condition.
By the 1960's they were 12¢. That would include your early Marvel books and some key DC books that would be worth a pretty penny.
25¢ books were mostly late 60s through the 70s. At this point the collectors market was growing so there are a lot more copies in good shape floating around. Still, key issues like the first Wolverine, Punisher, and some X-Men from that time are worth 100s.
I own way more comics than I need. I'm the 90s I was collection g old Hulk, Spider-Man, and Fantastic Four. Of course I was paying collector prices. Many have increased in value be really eBay kind of flooded the market. Where it used to be you had to hunt down books at comic shops, conventions, or even garage sales, now any issue you want is available on-line. Only the stuff in really good condition fetches price guide values these days.